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User’s Guide
Computer Speaker System
©1999 Altec Lansing Technologies, Inc., Milford, PA 18337
800-ALTEC-88 • www.altecmm.com
Specifications
System Response 30Hz — 20KHz
Total Audio Power 70 Watts
Inputs Digital
Front Speakers
Surround Speakers
Satellite Amplified Speakers
Speaker Drivers Four 3” (75mm) Full Range
Magnetically Shielded
Audio Power 35 Watts
Subwoofer
Speaker Driver Long Throw 6
1
/2”
(165mm)
Audio Power 35 Watts
Crossover Frequency 105Hz
Power Requirements
USA/Canada 120v/240w/60Hz
Europe/United Kingdom 230v/50Hz
And various Asian Countries
ETL/cETL/CE
One Year Limited Warranty
Altec Lansing Technologies, Inc. warrants to the end
user that all of its computer speaker systems are free
from defects in material and workmanship in the course
of normal and reasonable use for a term of one year from
the date of purchase.
This warranty is the exclusive and only warranty in
effect relative to Altec Lansing computer speaker
systems and any other warranties, either expressed or
implied, are invalid. Neither Altec Lansing
Technologies, Inc. nor any authorized Altec Lansing
Technologies, Inc. reseller is responsible for any
incidental damages incurred in the use of the speakers.
(This limitation of incidental or consequential damage is
not applicable where prohibited.)
Altec Lansing Technologies, Inc.’s obligation under this
warranty does not apply to any defect, malfunction or
failure as a result of misuse, abuse, improper installation,
use with faulty or improper equipment or the use of the
computer speaker systems with any equipment for which
they were not intended.
The terms of this warranty apply only to computer
speaker systems when such speakers are returned to the
respective authorized Altec Lansing Technologies, Inc.
reseller where they were purchased.
Under the terms of this warranty the original consumer
purchaser has certain legal rights and may have other
rights which vary worldwide.
ACS56ACS56
Introduction
The ACS56 is especially designed as a “Gaming”
amplified speaker system. The input signals to operate the
speakers are obtained from a multimedia computer with a
gaming “sound” card. The ACS56 can also operate from
a stereo sound card. However, in this instance only stereo
operation of the speakers is possible.
The ACS56 consists of four satellite speakers and a
subwoofer. The satellite speakers are magnetically
shielded and can be placed close to the computer monitor
without distorting color or images. The subwoofer is not
magnetically shielded and should not be placed close to
the monitor.
All stereo and surround sound is processed from the
satellite speakers. Subwoofer frequencies are monaural
and contain no stereo or surround information. As a result,
the subwoofer does not have to be placed in any particular
relationship to the satellite speakers. The subwoofer is not
magnetically sheilded and should not be placed near the
monitor. Placing the subwoofer on the floor close to a
wall, corner of a room or under a desk gives excellent
results. Figure 1 shows a typical arrangement of the
speakers for best stereo and spatial affects.
Figure 1
The lightning flash with arrowhead, within an equilateral triangle, is
intended to alert the user to the presence of uninsulated “dangerous
voltage” within the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to persons.
CAUTION: TO PREVENT THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK). NO USER- SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
SAFETY INSTRUCTIONS
The exclamation point within an equilateral triangle is intended to
alert the user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the appliance.
IMPORTANT
Read Instructions — All the safety and operating instructions should be read before
the appliance is operated.
Retain Instructions — The operating instructions should be retained for future
reference.
Heed Warning — All warnings on the appliance and in the operating instructions
should be adhered to.
Follow Instructions — All operating and use instructions should be
followed.
Water and Moisture — The appliance should not be used near water – for example,
near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a
swimming pool, etc.
Outdoor Use — Warning: To reduce the risk of fire or electric shock, do not expose
this appliance to rain or moisture.
Location — The appliance should be installed in a stable location.
Ventilation — The appliance should be situated so that its location or position does
not interfere with its proper ventilation. For example, the appliance should not be
situated on a bed, sofa, rug, or similar surface that may block the ventilation
openings; or placed in a built-in installation, such as a closed bookcase or cabinet that
may impede the flow of air through the ventilation openings.
Heat — The appliance should be situated away from heat sources such as radiators,
heat registers, stoves, or other appliances (including amplifiers) that produce heat.
Power Sources — The appliance should be connected to a power supply only of the
type described in the operating instructions or as marked on the appliance.
Power-Cord Protection — Power-supply cords should be routed so that they are not
likely to be walked on or pinched by items placed upon or against them. Pay
particular attention to cords at plugs, convenience receptacles, and the point where
they exit from the appliance.
Grounding or Polarization — The precautions that should be taken so that the
grounding or polarization means of an appliance is not defeated.
Cleaning — The appliance should be cleaned only with a polishing cloth or a soft
dry cloth. Never clean with furniture wax, benzine, insecticides or other volatile
liquids since they may corrode the cabinet.
Non-Use Periods — The power cord of the appliance should be unplugged from the
outlet when left unused for a long period of time.
Object and Liquid Entry — Care should be taken so that objects do
not fall and
liquids are not spilled into the enclosure through openings.
Damage Requiring Service — The appliance should be serviced by
qualified service
personnel when:
•
The power-supply cord or the plug has been damaged.
•
Objects have fallen, or liquid has been spilled into the appliance.
•
The appliance has been exposed to rain.
•
The appliance does not appear to operate normally or exhibits a marked
change in performance.
•
The appliance has been dropped or the enclosure damaged.
Servicing — The user should not attempt to service the appliance. Servicing should
be referred to qualified service personnel or returned to the dealer or call the Altec
Lansing service line for assistance.
Connecting the Power Cord
AC Wall Socket
Long slot is neutral
(ground) side.
Insert the wide blade into the
ground side slot.
CAUTION
To prevent electric shock do not use this (polarized) plug with
an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade exposure.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR
MOISTURE.
The FCC Wants You to Know
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
a)Reorient or relocate the receiving antenna.
b)Increase the separation between the equipment and receiver.
c)Connect the equipment to an outlet on a circuit
different from that to which the receiver is connected.
d)Consult the dealer or an experienced radio/TV technician
or help.
FCC Warning
Modifications not expressly approved by the manufacturer could void the
user authority to operate the equipment under FCC Rules.
Setup Instructions
(See Figure 2)
Do not insert the power
plug into an AC outlet
until all connections
are made.
Notice that the input
jacks on the subwoofer
are color coded to
prevent errors. The
plugs that are inserted
into these jacks have
matching colors. As an
example, the left front
speaker satellite has a
brown connecting plug.
The plug is inserted into
the brown color strip
under the left front
jack marking. All other
connections are made in
the same way. A DIN
plug is used to make the
connections for the
right front satellite
speaker. Note that the
DIN plug has an arrow.
The arrow should face
up for easy insertion
into the DIN jack.
Computer gaming
sounds cards have three
outputs. Most usually,
the outputs will be
marked as Digital
output, Front output and Surround output. Some slightly
different terminology may be used. However, the sound
card instructions will provide information so that you
can determine what the outputs are. Connect the ACS56
three inputs to the computer sound card.
Stereo Operation.If your computer only has a stereo
sound card, the ACS56 will still provide excellent
performance. In this instance the sound card stereo
output should be connected to the Front speaker input.
Both Front/Surround speakers will be operational. The
front and surround speakers in the left channel with
perform as the left surround stereo channel and the right
front and rear speakers will be the stereo right channel.
The mode button should be in stereo function.
Insert the power plug into an AC outlet. The unit is now
ready to be operational.
Operation of the controls
(See Figure 3)
On/Off Switch.The on/off switch is located on the rear
of the right satellite speaker. Press this switch to turn the
unit on, the Mode indicator will light to show power is
on. Press the switch again to turn power off. Operation
any of the functions will also turn the unit on. In this
instance, to turn the unit off, press the On/Off switch.
Master Volume Control.The master volume control
has several functions. It operates as a master volume
control for the overall system and can be used to
individually adjust the levels of Bass, Treble, or
Surround sound. If any of these functions is selected and
not used for a few seconds, the control reverts back to
becoming a master volume control.
Seven level indicators around the control show the
position of the control. In the extreme counter-clock
position all LED’s are off. As the control is rotated
clockwise the LED’s illuminate one at a time until in the
maximum position, all LED’s are on.
If one of the functions buttons has been depressed (BASS
or TREBLE), the master level rotary control will adjust
the level of the function selected. In this mode, the green
Figure 3
function indicator associated with the function will be
illuminated: see TREBLE/BASS CONTROLS below.
Treble/Bass Controls. To raise or lower the treble or
bass response, press the switch next to each mode
selector, a green indicator will glow to show the function
is operational. Turn the ROTARY control clockwise to
increase response and counterclockwise to decrease
response. Once the level is set, the indicator next to the
function will turn off after a short period. Each function
can be turned off quickly by pressing the function button
a second time. To reset the Treble and Bass controls to
the factory preset (flat) position, depress and hold the
corresponding button for a period of approximately three
seconds. The green indicator will go out denoting the
control has been reset. Once the green indicator is off,
the master volume control becomes operational.
Mode Selector.The LED indicator above the Mode
switch can operate in two colors, Green and Amber. By
pressing the mode switch repeatedly, the mode of
operation can change from Stereo to the “Gaming”
mode. When the LED is Green the ACS56 is in the
Gaming mode and when the LED is amber, the unit is in
the stereo mode.
Surround Channel Volume Level Adjustments.To
adjust the volume level of the surround speakers, in
either the stereo or gaming mode, hold down the Mode
button until the level indicators around the Master
Volume Control flash On/Off. The flashing LEDs
indicate that the master volume control is programmed
to adjust the level of the rear speakers. If the control is
not actively used for a short while, the control reverts
back to becoming a master volume control.
Placement of Speakers
Some experimentation may be required to obtain the best
sound effects in your particular room environment. The
subwoofer achieves maximum efficiency when placed
on the floor and close to a wall or corner of a room. In
this instance the walls behave as an extension of a
speaker horn. The subwoofer is not sheilded and should
not be placed near the monitor. The front satellites can be
close to the monitor or stretched out as far as the speaker
cords allow. The placement depends on where the
listener sits. The surround speakers can be placed
slightly behind the listener or as far as the speaker cords
allow. Most usually the speakers are placed at ear level
or slightly above. The surround speaker stands contain
notches for mounting the surround speakers to a wall
with screws, if desired. Sound effects may vary
depending on how the recordings are made. By re-
arranging the speakers from time to time the listener will
become aware which arrangement gives best results.
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